Rotary fan.



W. SPARKS.

' ROTARY FAN. PPLIOATION FILED 001217, 191

Patented Sept. 2, 1913.

, {entree snares PATENT WiLLIAM SPARKS, or Manson, MICHIGAN, ASSIGNOR nome srs iaxsrwxwnmo'ron COMPANY, or .mcxson, MICHIGAN, A connona'rion onsalesman.

ROTARY rein Specification of Letters rates-t.

Application filed October 17, 1911. Serial N0. 655,187.

.- more particularly with the gas engines of automobiles for circulatingair around and cooling the cylinders. When used in this relation theyare necessarily placed in the small space between the engine and grillwork or radiators in the end of, the hood and owing to the factthat theyare driven, at high speed and together with the adjacent parts ofthe/machine are subjected to more or less severe vibration due to thejolt-- ing of the machine in passing over uneven roads, the fan isliable to contact with the radiator or other parts of the machine andthereby damage or destroy one or the other of the contacting parts. 7

My object, therefore, is to provide a onepiece sheet metalfan with a rimin which all portions of the blades are within the planes of oppositesides or edges of the rim so that the rim' will act as a fender toprotect the blades against contact with adjacent objects.

Another object is to utilize portions of the, rim for bracing theotherwise unattached portions of the blades and. thereby maintainingthese portions of the blades at their adjusted angles against deflectionby impact with the air, thus increasing the efficiency of the fan andfurther reducing liability to injury.

Other objects and uses will be brought out in the following description.

In the drawings Figures 1 and 2 are oppo-.

site face views of my improved fan. Figs. 3 and 4 are respectively anedge view partly broken away and a sectional view of thesame fan thelatter being taken on line 4-4,

Fig. 2.

This fan preferably consists of a one-piece sheet metal plate circularin form and having its marginal edge deflected laterally atsubstantially right angles to the main body '-1- for forming an annularflange 2- These blades are formed by portions of the plate. at '-HI,1d.then shearing the plate circumferentially from Patented Sept. 2, 191a.

.flection of the outer ends of the blades 13-." utt ng away be same sideof each of the openings close to the rim or annular flange across thegreater portion of the wid h 0 the blade, leaving the outer end of theblade v integrally united by a comparatively nar-' row neck .--5-- tothe rim, while the inner ends of the blades are connected by acontinuous central web 6 having a central -0 emng I for receiving ashaft, hub, or

0 her support upon which the fan may be mounted for rotary movement. Thegreater portions of the outerends of the blades are therefore separatedfrom the rimby +8-, thereby allowing these portions of the blades to bedeflected or bent laterally slits:

from one side to a point in proximity to the I opposite side of the rimas shown more these portionsofthe blades which are other wiseunsupport'edagainst lateral vibration or deflection by impact with theair during rotation of the fan, said indentations being shown moreclearly in Fig.2. These blades elearly in Figs. 3 and 4, the point's ofthe close proximit to the inner face of said ,rim.

are of uniform shape and size, preferably tapering and of greater areathan the intervening spaces and are spaced equidistant apartcircumferentially with their wider ends adjacent. the rim and allportions thereof wholly within the planes of the opposite sides of therim so that when the fan is in operation, the rim serves as a fendertoprevent, contact of the blades with ad acent portions of the machine orother objects.

\Vhat I claim is: I 1; A fan consisting of a one-piece sheet metalcircular plate having its marginal edge bent laterally at substantiallyright angles thereto for forming a guard flange,

the main body of the plate having portions thereof cut away to form aseries of blades and intervening openings, the openings being of lessradial length than the radius of the fan, leaving a central web unitingthe v of suflicient width to cover the lateral deinner ends of. theblades, the outer ends of 80 or stamped inwardly at -9 into contact withthe points of the blades to brace and hold the blades being separatedfrom. the rim by rim.

slits extending in the same direction from the openings at one edge to apoint in proxiinity to the opposite edge of the blades, leavingrelatively narrow webs uniting the outer ends of the blades to the rim,the portionsof the outer edges of the blades which are separated by theslits from the rim being deflected laterally and means for connectingthe deflected portion of the blades to the 2. A fan consisting of aone-piece sheet metal circular plate having its marginal edge bentlaterally at substantially right angles thereto for forming a guardflange, the main body of the plate having portions i-llGIEOf cutaway toform a series of blades and intervening openings, the openings being ofless radial length than the radius of the fan, leaving a central webuniting the inner ends of the blades, the outer ends of the blades beingseparated from the rim by slits extending inthe same direction from-,the openings at one edge to a point in proximity, to the opposite edgeof the blades, leaving relatively narrow webs uniting the outer ends ofthe blades-to the rim, the portions of the outer edges of the bladeswhich are separated by the slits from the rim being deflected laterallyto points in close proximity to the opposite edge of the rim',

said rim having portions thereof depressed inwardly against the pointsof the blades.

3. A fan comprising a sheet metal plate and a laterally extending rimtherefor, a series of radially extending blades formed from said plateand a portion of each blade attached to the rim, the portion of eachblade unattached to the rim being deflected laterally, and means forconnecting the de' flected portion of said blade to. the adjacentportion of the rim. t

4. A fan consisting of-a one-piece, sheet metal circular plate havingits marginal edge bent laterally at substantially rightangles theretofor forming a guard flange, the main body of the plate cut to form aseries of blades of less radial length than the radius of thefan,leaving a central web,

portions of the outer 'ends of the blades beiing separated fromthe rimby slits of less length than the width of the-blade, leaving arelatively narrow web uniting theouter ends of the blades to the rim,the portion of the blades separated from the rim by slits 5 beingdeflected laterally, and means for connecting the deflected portions ofthe blades to the rim.

5. A fan consisting of a one-piece, sheet edge bent laterally atsubstantially right angles thereto for forming a guard flange, themainbody of the plate cut to form a I series of blades of less radial lengththan portions of the outer-ends-of the blades being separated from therim by slits of less length that. the width of the blade, leaving arelatively narrow web uniting the outer ends of the blades to the rim,the portion of the blades separated from'the rim by slits beingdeflectedlaterally, and means in connection with the rim for supportingthe-deflected portions of the blades.

my hand on this ninth day of October, 1911; \VILLIAM SPARKS.

Vitnesses: T

LILLIAX Vnrnanmcn F. G. VVHITIINGTON. I

metal circular plate having its marginal the radius of the fan, leavingacentral web, p

In witness whereof I have-hereunto set v

